Abstract: The interaction of co-pyrolysis of plastic, textile, leather and sponge, which were typical combustible components of automotive shredding residues, was investigated using thermogravimetry-mass spectrometry (TG-MS) and distributed activation energy model (DAEM). The characteristics of pyrolysis weight loss, kinetics and gas production were discussed. The results indicated that interactions existed among all four components, as evidenced by a comparison of the single-component linear weighted fit data and the mixed pyrolysis experimental data. Specifically, the average activation energy of textile and leather, sponge and plastic, sponge and textile co-pyrolysis decreased by 22.2, 25.7 and 33.4 kJ/mol, respectively. In contrast, the average activation energy of sponge and leather co-pyrolysis increased by 7.9 kJ/mol. The participation of sponge could promote the generation of small molecule gases in the mixed sample, while leather, textile and sponge co-pyrolysis could prevent the irregular chain-breaking reaction of plastic to generate small molecule hydrocarbons such as C2H4 and C3H8.

Key words: automotive shredder residue(ASR), pyrolysis, kinetics, interaction